Canon 52mm UV Hase
These filters are used by many photographers to protect the front element of their lens from abrasions, dust, and moisture. They also have a very subtle warming effect, which can be useful to counter the "cool" colors you sometimes get in bright sun or in shade. They're available in sizes to fit most EF lenses.

TYPE: Screw-in
Canon 52mm UV (Ultra Violet) Glass Filter.

Canon 52mm UV (Ultra Violet) Glass Filter

Canon 52mm UV (Ultra Violet) Glass Filter

Features-
Canon 52mm UV (Ultra Violet) Glass Filter

Ultraviolet filters
allow you to correct for the UV effect to varying degrees.